/*

Copyright (C) 2016 Apple Inc. All Rights Reserved.

See LICENSE.txt for this sample’s licensing information

Abstract:

Support code for the `simd` geometric primitive playground.

*/

import simd

/// Enum for possible results of an incircle test.

public enum IncircleResult {

    case insideCircle

    case onCircle

    case outsideCircle

    case nan

    /// Initialize incircle result from a floating-point value.

    public init<T: FloatingPoint>(_ value: T) {

        if value < T(0) { self = .outsideCircle }

        else if value > T(0) { self = .insideCircle }

        else if value == T(0) { self = .onCircle }

        else { self = .nan }

    }

}

/// Enum for possible results of an orientation test.

public enum Orientation {

    case positivelyOriented

    case degenerate

    case negativelyOriented

    case nan

    /// Initialize orientation result from a floating-point value.

    public init<T: FloatingPoint>(_ value: T) {

        if value < T(0) { self = .negativelyOriented }

        else if value > T(0) { self = .positivelyOriented }

        else if value == T(0) { self = .degenerate }

        else { self = .nan }

    }

}

public extension float2x2 {

    /// Determinant of `self`.

    var determinant: Float { return matrix_determinant(self.cmatrix) }

}

public extension float3x3 {

    /// Determinant of `self`.

    var determinant: Float { return matrix_determinant(self.cmatrix) }

}

public extension float4x4 {

    /// Determinant of `self`.

    var determinant: Float { return matrix_determinant(self.cmatrix) }

}